JPS56146877A - Surface hardening method for titanium and its alloy - Google Patents

Surface hardening method for titanium and its alloy

Info

Publication number
JPS56146877A
JPS56146877A JP4920280A JP4920280A JPS56146877A JP S56146877 A JPS56146877 A JP S56146877A JP 4920280 A JP4920280 A JP 4920280A JP 4920280 A JP4920280 A JP 4920280A JP S56146877 A JPS56146877 A JP S56146877A
Authority
JP
Japan
Prior art keywords
nitrogen
blank material
jets
flowed
operating gas
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP4920280A
Other languages
Japanese (ja)
Other versions
JPS5948953B2 (en
Inventor
Katsumi Muroi
Mitsuaki Haneda
Hideo Nakae
Kensho Hosoya
Nushito Takahashi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koki Holdings Co Ltd
Hitachi Ltd
Original Assignee
Hitachi Ltd
Hitachi Koki Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd, Hitachi Koki Co Ltd filed Critical Hitachi Ltd
Priority to JP4920280A priority Critical patent/JPS5948953B2/en
Publication of JPS56146877A publication Critical patent/JPS56146877A/en
Publication of JPS5948953B2 publication Critical patent/JPS5948953B2/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
    • C23C8/36—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases using ionised gases, e.g. ionitriding

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)

Abstract

PURPOSE:To provide hardness to the required part alone by performing local heating and blowing of gaseous nitrogen for a blank material simultaneously by means of plasma jets. CONSTITUTION:Mixed gases of nitrogen and argon are flowed from an operating gas passage 4 and gaseous nitrogen is flowed from a shielding gas passage 6 by using, for example, a plasma torch 1, to form an inert atmosphere, by which a blank material 7 is shut off from the atmosphere. Next, electric current is flowed between a tungsten electrode 2 and the nozzle 3, to generate plasma jets 8. The blank material 7 is heated by this, and at the same time, ionized nitrogen is ejected by the jets 8, whereby hardening reaction is accelerated. At this time, the jets 8 are maintained stably by keeping the nitrogen mixing rate of the operating gas 4 at <=30%. The flow rate of the operating gas is kept about <=10l/mm. in order to prevent the surface roughness of the blank material after the treatment from degrading.
JP4920280A 1980-04-16 1980-04-16 Surface hardening method for titanium and its alloys Expired JPS5948953B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4920280A JPS5948953B2 (en) 1980-04-16 1980-04-16 Surface hardening method for titanium and its alloys

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4920280A JPS5948953B2 (en) 1980-04-16 1980-04-16 Surface hardening method for titanium and its alloys

Publications (2)

Publication Number Publication Date
JPS56146877A true JPS56146877A (en) 1981-11-14
JPS5948953B2 JPS5948953B2 (en) 1984-11-29

Family

ID=12824400

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4920280A Expired JPS5948953B2 (en) 1980-04-16 1980-04-16 Surface hardening method for titanium and its alloys

Country Status (1)

Country Link
JP (1) JPS5948953B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2661424A1 (en) * 1990-04-27 1991-10-31 Pechiney Recherche Process for surface nitriding of an article made of titanium alloy and article obtained
JP2008506532A (en) * 2004-07-09 2008-03-06 フラウンホーファー−ゲゼルシャフト　ツル　フェルデルング　デル　アンゲヴァンテン　フォルシュング　エー　ファウ Method for producing a wear-resistant and fatigue-resistant edge layer in the form of a titanium alloy and components produced by said method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2661424A1 (en) * 1990-04-27 1991-10-31 Pechiney Recherche Process for surface nitriding of an article made of titanium alloy and article obtained
JP2008506532A (en) * 2004-07-09 2008-03-06 フラウンホーファー−ゲゼルシャフト　ツル　フェルデルング　デル　アンゲヴァンテン　フォルシュング　エー　ファウ Method for producing a wear-resistant and fatigue-resistant edge layer in the form of a titanium alloy and components produced by said method

Also Published As

Publication number Publication date
JPS5948953B2 (en) 1984-11-29

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